Answer:
a) 3,000 b) 800 c) 10,000
Step-by-step explanation:
First of all, you need to understand what the significant figures are: they are the known digits and the first uncertain (the rounded digit). For example, 1.28 has 3 significant figures, two certain (1 and 2) and one uncertain (8). The zeros on the right of the number are significant figures, those on the left are not (1,200 has 4 significant figures, 0.023 has 2 significant figures and 1.023 has 4 significant figures). Here's the solution.
- 29 × 31 / 0.27 ≈ 3,329.6296 Now we need to find the significant figures and round the number to the first one which in this case is 3. Answer: 3,000.
- 4.8 × 37 / 0.21 ≈ 845.71428 The first significant figure is 8. Answer: 800.
- 9.7 × 26 / 0.022 ≈ 11,463.636 The first significant figure is the first 1. Answer: 10,000.
I hope I helped you, I'm not a native English speaker so I'm Sorry if the explation is confusing or there are many mistakes. Bye :D
